%%
%% The LaTeX Companion, 2ed (second printing August 2004)
%%
%% Example 7-4-1 on page 349.
%%
%% Copyright (C) 2004 Frank Mittelbach, Michel Goossens,
%%    Johannes Braams, David Carlisle, and Chris Rowley
%%
%% It may be distributed and/or modified under the conditions
%% of the LaTeX Project Public License, either version 1.3
%% of this license or (at your option) any later version.
%%
%% See http://www.latex-project.org/lppl.txt for details.
%%

\documentclass{ttctexa}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{183.0pt}
\StartShownPreambleCommands

\StopShownPreambleCommands
\begin{document}
Therefore, $\mathsf{G}$ can be computed as
\begin{equation}
  \mathsf{G} = \mathcal{A} +
               \sum_{i=1}^{n} \mathcal{B}_{i}
\end{equation}
\end{document}
